828728465 has 8 divisors (see below), whose sum is σ = 1017601728. Its totient is φ = 647564400.

The previous prime is 828728441. The next prime is 828728473. The reversal of 828728465 is 564827828.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-828728465 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1927061 + ... + 1927490.

It is an arithmetic number, because the mean of its divisors is an integer number (127200216).

Almost surely, 2^828728465 is an apocalyptic number.

It is an amenable number.

828728465 is a deficient number, since it is larger than the sum of its proper divisors (188873263).

828728465 is a wasteful number, since it uses less digits than its factorization.

828728465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3854599.

The product of its digits is 1720320, while the sum is 50.

The square root of 828728465 is about 28787.6443114055. The cubic root of 828728465 is about 939.2994875207.

The spelling of 828728465 in words is "eight hundred twenty-eight million, seven hundred twenty-eight thousand, four hundred sixty-five".